Make calculations for percentages of net sales available as part of the servers close out report. We tip share and waste lots of time at the end of the night calculating support staff tips. For example make it so there is a slot you can add title like busser and identify it as a variable percentage of net sales. Lets just say net sales is $1000. A 3% busser payout on the slip should already have a line saying busser $30 and one for food runner at 2% saying $20. That should be a calculation outside of the cash due to the store. Every other POS system ive worked with factors these things automatically.